Low-noise voltage regulator

[Mike(Mont)]

Probably wasting my time here but was wondering if anyone knows about a low-noise voltage regulator? Have a 500ma load at five volts. I got one of those adjustable ones from ebay and it is noisy.

My theory is there is a large amount of electronic pollution and when it is near the receiver antenna probably where one of the problems is with the ToTeM. So far my solution has been to use the proper voltage battery (no regulator) and 5 volts not easy to come by. Used a 4.8 volt NiMH and it doesn't last very long. Any help would be appreciated. Need 500ma 5volts +-0.5v. thanks

[Mike(Mont)]

Well ,maybe my receiver is part of the problem. But it really picks up the noise from a few feet away and my guess is the same thing is happening with other devices. I've used two different types of regulators and both had the same issues. Something like the ToTeM the antenna is very near to the regulator. I don't know but if I had one i would try bypassing the regulator and use exact voltage battery.

[Geo]

Try to buy a better quality regulator from a local shop.
On ebay there are a lot of China trash.
Last days i had a similar problem with a LM317LZ.

[Mike(Mont)]

Thanks Geo. Oops, I got my wires crossed. Got confused with one of the ITMD projects. The ToTeM does not use a voltage regulator, at least on the plans.

I was thinking something like a LM7805. Does that sound okay?

Thanks.

[Geo]

Originally Posted by Mike(Mont)

Thanks Geo. Oops, I got my wires crossed. Got confused with one of the ITMD projects. The ToTeM does not use a voltage regulator, at least on the plans.

I was thinking something like a LM7805. Does that sound okay?

Thanks.

Yes Mike, a 7805 its OK.
Also a lower drop out can be used as the classic LM317.
317 is more flexible because you can program the out voltage between 1.2 and 37V by the using of 2 external resistors.

[Mike(Mont)]

Okay, thanks Geo. I will check it out.

[reza vir]

Originally Posted by Mike(Mont)

Probably wasting my time here but was wondering if anyone knows about a low-noise voltage regulator? Have a 500ma load at five volts. I got one of those adjustable ones from ebay and it is noisy.

My theory is there is a large amount of electronic pollution and when it is near the receiver antenna probably where one of the problems is with the ToTeM. So far my solution has been to use the proper voltage battery (no regulator) and 5 volts not easy to come by. Used a 4.8 volt NiMH and it doesn't last very long. Any help would be appreciated. Need 500ma 5volts +-0.5v. thanks

Hello Brother
I accept more work regulators 78L05 and 79L05

Instead of the same regulators LM7805 and LM7905